Truck and wagon hoist



Nov. 27, 1951 Filed July 21, 1948 R. M. ULRICH TRUCK AND WAGON HOIST Nov. 27, 1951 Filed July 21, 1948l 2 SHEETS--SHEET 2 fn-z/efzlof" .Qymoma/ff rzlC, *H3 @la Patented Nov. 27, 1951 UNITED STAT ES PATENT t OFFICE TRUCKAND WAGONJHOIST .Raymond M'.'Ulrich, Roanoke,- Ill.

Y.-ihnzolication.Julycl, 1948,` SerialNo. l39,941

"The present invention relates :to a vehicle hoist or lifting device and more particularly tor a hydraulically operated devicefor lifting one vend of a wagon or truck.

VIt .is an object of the presentl invention to provide anfimproved hoist .which will produce a minimum .movement of fthe end of. the Wagon vor truck, of standard or common wheel base, which remains on the ground.

vAnother object ofthe present invention is to provide an improved vehicle hoist requiring ,a minimum of space andv yet providing maximum v.stability of operation.

A stillfurther objectY of the present'invention is to provide aniimproved truck and wagon hoist of the hydraulic typehaving equal lifting power on eachA side.

Still vanother object ofthe presentinvention is to provide an improved. vehicle hoist of the hydraulic operated type which may beutilized with diierent width cradles.

Still another objectof the present inventionris toprovidei an improved hydraulically operated vehicle hoistv which. may utilize hydrauliccylin- .ders and lifting arms such as those used in tractor loaders.

Other and further objects of .the present invention4 subsequently. will become apparent .by reference to the following description taken in conjunction with the Vaccompanying drawings wherein:

Fig. 1 isfa perspectiveview of the hoist in raised position;

Fig. 2 is a side viewofthe .hoist in raised position; and

Fig. 3 is a detailed view of the. equalizer `crankshaft.

Referring to the.` drawing it will be seen that the vehicle hoist constructed in accordance with the ypresent invention employstwo similar vertical framemembers I.I and I2 positionedy parallel to each other. Since. both side frame members are similar only one of these framemem-bers will be described in detail. Each frame memberincludes a base I3 .formed of channel iron or similar construction. Near the center ofthe channel I3 at opposite sides apair of support plates `I4 is provided each support plate having therein an opening or hole I5 for receiving a fastening bolt, or other securing device. Mounted on the side of the channel I3 and resting upon the sup-port plates I4 are parallel vertical support membersv I6 and I'I formed of pipe or, tubing. At .thetops of the vertical support'm'embers 'I6 and. IIV suitable bearing openings are provided for receiving a shaft or bolt .I8 which supports a lifting arm I9. The inner vertical member I6 is reinforced by tubular member 2| interconnecting rthetop of the member I6 with the channel base I3. r The top of the rother Vertical member I 1 is` Iinterconnected. with both ends of .the channel Y|3105r i the pipe-or tubing member 22-.Which also ser-ves 'pas alfluid conduit'v for conducting hydraulic fluid member I'I.

.to the lifting piston. At the ends of the channel I3 two upright plates 23 are provided which are interconnected to the shaft or bolt 24 which serves as apivotal support for the end of the hydraulic cylinder 25. The hydraulic cylinder 25 is connected by a flexible conduit or hose 26 to the pipe22. The hydraulic cylinder 25 has. a

the loader in the operation of the truck and wagon hoist.

At an intermediate point between the upright member I1 and one extremity of the channel I3 the channel I3 lis provided with a pair of upright vplatesv 28 and 29. `The tops of these plates' 23 rand 2S are welded to a strip cf metal 3i which alsoiswelded tothe top of the channel I3 between the end of the channel and the upright the one plate 28 andthe channel i3' are provided with tapped openingsfor receiving cap screws 32 which pass through a yflange 33 connected to a pipel 34which extends between the two frames I I and I2. 'As may be seen from Fig.' l frames II and I2 are also interconnected adjacent their other endsby a cross-member' 35.

"The interconnecting pipe 34 serves as a bearingl member `foran equalizing crankshaft consistfing of av sleeve 36v having-a kpair-of arms 3l and. 33.

rThe .arms`3land33` are connected to links'39 which in :each instance are connected to the con- --nection betweemthe' varm I3 Vand the piston'rod 21. J-.sleeve 35'is alpipe III;` which is connected at its ends bygmeansfofl afhose or conduit '6.12 to ithe tubular .'frame'memberf22. The pipe 4I at one end is pro- CoaXially arranged'with the 'pipe 34 .and the violedrwith.y a T Vconnection All'which is .connected 'by asri'iexible :conduit-1 to'a source othydraulic power.

Eachilifting arm. :I 9. consists Aofla' tubular Amein- 'fberf 444 having'atone end an apertured'plate' .forfmakingf a pivotal-'connection to the piston rod y 2l'fand the link'39. Weldedto the .tubular niember- 44-is a plate 43-which `in' vturntiis'intercon- .nectedifbya brace rodorplate` 47! tothe; pipe 44. The plate-43 is provided with suitable apertures .for-receiving. boltswhich pass through a 4pivotal 4supporti iS-which. has a bearing portion carried bythebolt IIB. 'Eachfof the frames II and iZ'is l also provided.- with'4 a stabilizing, lever or lint: i3 fwhichis pivotally. connected to a suitable. point on thetupright-.member :I 3.

Mounted Ybetween the fouterxtremities of the arms ;I 9 'isa-lifting cradle 5I formed of twov parallel angleirons 52.and 5-3-interconnectedrat :their It vmay be seen from Fig. 3 that.

of the angle irons 52 and 53 are interconnected by angle irons 55 and 55 which carry upright connecting members 51 and 58'; Each of the upright interconnecting members 5l and 58 is provided with a bifurcated portion for receiving a cooperating pivotally connected member 59 secured to the upper extremity of the tubular member 44 of the arm I9. The inverted angle irons 52 and 53 being spaced apart engage the Wheel of a wagon or truck in such manner as to`v securely cradle the wheel and to hold it securely.

The stabilizing linksjrg are selected to be of such length and are pivotally mounted on the members l 6 at such points that the cradle 5| will securely hold the Wheels of the Wagon or truck and yet the arc described by the axle of the Wheels being raised Will approximate an arc made when the axle of the Wheel Which is on the ground is fixed in a stationary position. Thus in spite of the fact that the radius of the arc shown in dotted line in Fig. 2 is less than the wheel base of the vehicle, the Wheels which are on the ground do Vnot move any substantial amount.

' sate for the effect of the length of the wheel base of the vehicle being greater than the arc described by the lifting arm i9.

While for the purpose of illustrating and describing the present invention a preferred embodiment has been illustrated in the drawings, it is to be understood that the invention is not to be limited thereby since such variations in the components employed and in their arrangement is contemplated as may be commensurate with the spirit and scope of the invention set forth'in the accompanying claims.

What I desire to protect by United States Letters Patent is claimed as follows:

1. A vehicle hoist comprising a pair of parallel triangular frame members formed of tubular material, a portion of which serves as a hydraulic conduit, a pivoted lifting lever mounted at the apex of each frame member, each lever being of the bell crank type, a hydraulic cylinder and piston mounted on each frame member and con- 3. A vehicle hoist comprising a pair of parallel triangular frame members each having a base and a vertical'portion formed of tubular matenected to a lifting lever, an equalizing crank interconnecting said levers, said crank having a rotational axis located in the proximity of the base of said frame members, a hydraulic conduit interconnecting said frame members, a ilexible conduit interconnecting each cylinder with the conduit portion of its associated frame, and a cradle mounted between the free ends of said levers for engaging both wheels of a vehicle axle.

2. A vehicle hoist comprising a pair of parallel triangular frame members formed of tubular material, a portion of which serves as a hydraulic conduit, a pivoted lifting lever mounted on each frame member near its apex, each lever being of the bell crank type, a hydraulic cylinder and piston mounted on each frame member said levers, and a stabilizing lever interconnect- I ing each frame member With said cradle to preclude substantial tipping motion thereof.

rial, a portion thereof serving as a hydraulic conduit, a pivoted lifting lever mounted on each frame member adjacent the top thereof, each lever being of the bell crank type, a hydraulic cylinder and piston mounted on each frame member and connected to a lifting lever, an equalizing crank interconnecting said levers, said crank having a rotational axis located in the proximity of the base of said frame members, a hydraulic conduit interconnecting said frame members, a exible conduit interconnecting each cylinder with the conduit portion of its associated frame, a cradle for the Wheels of a vehicle axle mounted between the free ends of said levers, and a stabilizing lever-interconnecting each frame member with said cradle for moving said cradle in a path so that the axle of the Wheel of the vehicle supported thereby approximates an arc of a radius equal to the Wheel base of the vehicle.

4. A vehicle hoist comprising a pair of parallel frame members each having a box frame base and a triangular vertical portion formed of tubular material, a portion thereof serving as a hydraulic conduit, a pivoted lifting lever mounted on the apex of each frame member, a hydraulic cylinder and piston mounted on each frame member and connected to a lifting lever, an equalizing crank interconnecting said levers by means of lever links, said crank having a rotational axis located in the proximity of the baseof said frame members, a hydraulicA conduit interconnecting said frame members, said conduit having its axis in the proximity of the rotational axis of said crank, conduit means interconnecting each cylinder with the conduit portion of its associated frame, a vehicle wheel engaging cradle mounted between the free ends of said levers, and a stabilizing lever interconnecting each frame member with said cradle.

5. A vehicle hoist for engaging a pair of Wheels of a vehicle comprising a cradle for receiving said Wheels, a .pair of vertical parallel triangular frames formed With an integral hydraulic conduit, a bell crank lever mounted near the apex of each frame and connected at one end by a pivotal connection to said cradle, a

hydraulic cylinder and piston carried by each frame and pivotally connected to the other end of said lever, a fluid conduit interconnecting each cylinder with the hydraulic conduit of its associated frame, an equalizing crank interconnecting said pistons, said crank having its axis of rotation in the proximity of the base of said frames, and extending there between, a conduit interconnecting the integral hydraulic conduit portions of said frames, and means for supplying hydraulic fluid under pressure to said conduit and said hydraulic cylinder.

RAYMOND M. ULRICH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 949,331 Schelle Feb. 15, 1910 1,559,098 Hopkins Oct. 27, 1925 2,400,316 Page May 14, 1946 2,438,571 Maxon Mar. 30, 1948 2,449,863 Ross Sept. 21, 1948 

